George Cukor's IMDB Page
Notable films: My Fair Lady, A Star is Born, The Philadelphia Story, The Women, Gaslight
Carl Theodor Dreyer Jr's IMDB Page
Notable films: The Passion of Joan of Arc, Ordet, Day of Wrath, Gertrud
Frank Capra's IMDB Page
Notable films: It's a Wonderful Life, Mr. Smith Goes to Washington, It Happened One Night, Arsenic and Old Lace
Orson Welles IMDB Page
Notable Films: Citizen Kane, Touch of Evil, Mr. Arkadin, Othello, The Magnificent Ambersons